<script type="text/javascript"> 

window.onload = function() {  

var show = document.getElementById("show");  

setInterval(function() {   

var time = new Date();   // 程序計時的月從0開始取值后+1   

var m = time.getMonth() + 1;   

var t = time.getFullYear() + "-" + m + "-"     

+ time.getDate() + " " + time.getHours() + ":"     

+ time.getMinutes() + ":" + time.getSeconds();   

show.innerHTML = t;  

}, 1000); 

};

</script>